/**
 * This file is part of 1genia trampoline
 * Copyright (C) 2007 1genia (contact@1genia.com)
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; version 3 of the License. 
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details. 
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; see the file COPYING.TXT.  If not,
 * write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301, USA. 
 **/
package com.genia.toolbox.projects.toolbox_basics_project.spring.manager.impl;

import com.genia.toolbox.basics.exception.technical.TechnicalException;
import com.genia.toolbox.persistence.criteria.Criteria;
import com.genia.toolbox.persistence.dao.AbstractDAO;
import com.genia.toolbox.persistence.exception.PersistenceException;
import com.genia.toolbox.projects.toolbox_basics_project.security.manager.impl.TrampolinePasswordEncoder;
import com.genia.toolbox.projects.toolbox_basics_project.bean.model.User;
import com.genia.toolbox.projects.toolbox_basics_project.bean.model.impl.UserImpl;
import com.genia.toolbox.projects.toolbox_basics_project.spring.manager.UserManager;

/**
 * implementatio of {@link UserManager}.
 */
public class UserManagerImpl
    extends AbstractDAO
    implements UserManager
{

  /**
   * the {@link TrampolinePasswordEncoder} to use.
   */
  private TrampolinePasswordEncoder trampolinePasswordEncoder;



  /**
   * authenticate a user.
   * 
   * @param user
   *          the user to authentificate
   * @param password
   *          the password user.
   * @return <code>true</code> if the password corresponds with the userName,
   *         <code>false</code> otherwise.
   * @throws TechnicalException
   *           if an error occured
   * @see com.genia.toolbox.projects.toolbox_basics_project.spring.manager.UserManager#authenticate(java.lang.String,
   *      java.lang.String)
   */
  public boolean authenticate(User user, String password)
      throws TechnicalException
  {
    return getTrampolinePasswordEncoder().isPasswordValid(user.getEncryptedPassword(), password, user.getEncryptedPassword());
  }



  /**
   * authenticate a user.
   * 
   * @param login
   *          the login of the user to authentificate
   * @param password
   *          the password user.
   * @return <code>true</code> if the password corresponds with the userName,
   *         <code>false</code> otherwise.
   * @throws TechnicalException
   *           if an error occured
   */
  public boolean authenticate(String login, String password)
      throws TechnicalException
  {
    User user = getUser(login);
    if (user == null) {
      return false;
    }
    return authenticate(user, password);
  }



  /**
   * returns a {@link User} knowing its identifier.
   * 
   * @param identifier
   *          the identifier of the {@link User}
   * @return the {@link User} associated to the given identifier or
   *         <code>null</code> if no such user exists.
   * @see com.genia.toolbox.projects.toolbox_basics_project.spring.manager.UserManager#get(java.lang.Long)
   */
  public User get(Long identifier)
  {
    return get(UserImpl.class, identifier);
  }



  /**
   * get User object from its login.
   * 
   * @param login
   *          the login of the user
   * @return the User object
   * @throws PersistenceException
   *           if an error occured
   * @see com.genia.toolbox.projects.toolbox_basics_project.spring.manager.UserManager#getUser(java.lang.String)
   */
  public User getUser(String login)
      throws PersistenceException
  {
    Criteria<User> criteria = getCriteria(User.class);
    criteria.addRestriction(equals(getPropertyField(User.NAME_LOGIN), getConstantField(login)));

    return simpleFindUnique(criteria);
  }



  /**
   * getter for the trampolinePasswordEncoder property.
   * 
   * @return the trampolinePasswordEncoder
   */
  public TrampolinePasswordEncoder getTrampolinePasswordEncoder()
  {
    return trampolinePasswordEncoder;
  }



  /**
   * setter for the trampolinePasswordEncoder property.
   * 
   * @param trampolinePasswordEncoder
   *          the trampolinePasswordEncoder to set
   */
  public void setTrampolinePasswordEncoder(TrampolinePasswordEncoder trampolinePasswordEncoder)
  {
    this.trampolinePasswordEncoder = trampolinePasswordEncoder;
  }

}
